The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...

Imagine someone handing you a scrap of net from a basketball hoop, with knotted red cord attached to the netting, and telling you this bit of string is a clue in a puzzle. How quickly — if ever — ...

Sayonara, Sudoku. For a better-rounded puzzle that includes not just logic, but math, too, try KenKen. It's probably even good for you. Stephen Shankland worked at CNET from 1998 to 2024 and wrote ...

Are you ready for this math riddle test? Okay, in today’s math riddle, a series of numbers is used as logical reasoning to test your mental ability. So, can you prove you're in the 1% league with an ...

If you thought the Singaporean logic puzzle was tough, brace yourself for this math problem that was originally set for eight-year-old students in the Vietnamese town of Bao Loc. It’s apparently even ...